Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

PT6477 Datasheet(PDF) 9 Page - Texas Instruments

Part # PT6477
Description  14-A 3.3-V Input Adjustable Integrated Switching Regulator
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PT6477 Datasheet(HTML) 9 Page - Texas Instruments

Back Button PT6477 Datasheet HTML 5Page - Texas Instruments PT6477 Datasheet HTML 6Page - Texas Instruments PT6477 Datasheet HTML 7Page - Texas Instruments PT6477 Datasheet HTML 8Page - Texas Instruments PT6477 Datasheet HTML 9Page - Texas Instruments PT6477 Datasheet HTML 10Page - Texas Instruments PT6477 Datasheet HTML 11Page - Texas Instruments PT6477 Datasheet HTML 12Page - Texas Instruments PT6477 Datasheet HTML 13Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 14 page
background image
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Using the Inhibit Control of the PT6460 & PT6470
Series of Step-Down ISRs
The PT6460 (5-V input) and the PT6470 (3.3-V input)
series of integrated switching regulators (ISRs) provide
step-down voltage conversion for output loads of up to
14 A. For applications that require the output voltage
to be held off, these ISRs incorporate an Inhibit* control
(pin 1). The Inhibit* control input can be used for power-
up sequencing or whenever there is a requirement for
the output voltage from the ISR to be turned off.
The ISR functions normally with pin 1 open circuit,
providing a regulated output whenever a valid source
voltage is applied between Vin (pins 2–3) and GND (pins
5–8). When a low-level ground signal is applied to pin 1,
the regulator output is turned off 2 and the input current
is significantly reduced 3.
Figure 4-1 shows the typical application of the Inhibit*
function. Note the discrete transistor, Q1. The Inhibit*
control has its own internal pull-up to Vin potential. An
open-collector or open-drain device is recommended to
control this input 1. The voltage thresholds are given in
Table 4-1.
Table 4-1; Inhibit Control Requirements
Parameter
Min
Typ
Max
Enable (VIH)Vin – 0.5 V
Open
Disable (VIL)
–0.2 V
+0.8 V
I IL
–0.2 mA
Notes:
1. Use an open-collector device with a breakdown voltage
of at least 10 V (preferably a discrete transistor) for the
Inhibit* control input. A pull-up resistor is not necessary.
To disable the output voltage the control pin should be
pulled low to less than +0.8 VDC.
2. When a ground signal is applied to the Inhibit* control
(pin 1) the module output is effectively turned off (tri-
state). The output voltage decays to zero as the load
impedance discharges the output capacitors.
3. When the output is disabled via the Inhibit* pin, the
input current is reduced to approximately 5 to 10 mA.
Figure 4-1
Turn-On Time:
In the circuit of Figure 4-1, turning Q1 on
applies a low-voltage to the Inhibit* control (pin 1) and
disables the output of the regulator 2. If Q1 is then turned
off, the ISR executes a soft-start power up. Power up
consists of a short delay (approx. 2 msec), followed by a
period in which the output voltage rises to the full regu-
lation voltage. The module produces a regulated output
voltage within 10 msec. Figure 4-2 shows the typical rise
in both the output voltage and input current for a PT6464
(1.8 V), following the turn-off of Q1. The turn off of Q1
corresponds to the rise in the waveform, Q1 Vds. The
waveforms were measured with a 5VDC input voltage,
and 8.5-A load.
Figure 4-2
Vo (1V/Div)
Iin (2A/Div)
Q1Vds (5V/Div)
HORIZ SCALE: 2ms/Div
PT6460 & PT6470 Series
C
IN
560 µF
(Req'd)
COM
+V
IN
+
PT6464
2–4
5–812
9–10
Vin
Vout
Vo(adj)
GND
1
Inhibit*
C
OUT
330 µF
(Optional)
+Vsense
+
11
1 =Inhibit
Q
1
BSS138
L
O
A
D
GND
V
OUT
+V
SENSE


Similar Part No. - PT6477

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
PT6400 TI-PT6400 Datasheet
227Kb / 5P
[Old version datasheet]   3 AMP ADJUSTABLE INTEGRATED SWITCHING REGULATOR
PT6404 TI-PT6404 Datasheet
227Kb / 5P
[Old version datasheet]   3 AMP ADJUSTABLE INTEGRATED SWITCHING REGULATOR
PT6404D TI1-PT6404D Datasheet
527Kb / 7P
[Old version datasheet]   3 Amp 5V Input Adjustable Integrated Switching Regulator
PT6404E TI1-PT6404E Datasheet
527Kb / 7P
[Old version datasheet]   3 Amp 5V Input Adjustable Integrated Switching Regulator
PT6405 TI-PT6405 Datasheet
227Kb / 5P
[Old version datasheet]   3 AMP ADJUSTABLE INTEGRATED SWITCHING REGULATOR
More results

Similar Description - PT6477

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
PT5810 TI-PT5810 Datasheet
202Kb / 11P
[Old version datasheet]   20-A 3.3-V Input Adjustable Integrated Switching Regulator
PT6460 TI-PT6460 Datasheet
192Kb / 10P
[Old version datasheet]   14-A 5-V Input Adjustable Integrated Switching Regulator
PT6447 TI1-PT6447 Datasheet
172Kb / 8P
[Old version datasheet]   6-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator
PT5520 TI1-PT5520 Datasheet
185Kb / 9P
[Old version datasheet]   1.5-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator
PT5502 TI-PT5502 Datasheet
174Kb / 2P
[Old version datasheet]   3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator
PT6440 TI-PT6440 Datasheet
178Kb / 8P
[Old version datasheet]   6-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator
PT5521 TI-PT5521 Datasheet
164Kb / 7P
[Old version datasheet]   1.5-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator
SLTS102A TI-SLTS102A Datasheet
194Kb / 8P
[Old version datasheet]   14-A 12V-Input Adjustable Integrated Switching Regulator
PTH04070W TI-PTH04070W_07 Datasheet
436Kb / 16P
[Old version datasheet]   3-A, 3.3/5-V INPUT ADJUSTABLE SWITCHING REGULATOR
PTH04070W TI-PTH04070W_15 Datasheet
380Kb / 17P
[Old version datasheet]   3-A, 3.3/5-V INPUT ADJUSTABLE SWITCHING REGULATOR
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com